Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
trinh van » trinh han, trinh quan, trinh toan
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan ban » van ban
hanh va » hang va, hanh vi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sang - hanh ((hanh va) or (trinh van)) nang ((cong dan) or (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh ((hanh va) OR (trinh van)) nang ((cong dan) OR (cong san)) toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh ((hanh va) or (trinh van)) nang ((cong dan) or (cong san)) toan ban*.